For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningStationary Window Waterleak Repair
Note: If any water enters the vehicle interior up to the level of
the carpet or higher and soaks the carpet, the sensing and diagnostic
module (SDM) and the SDM harness connector may need to be replaced. The SDM
could be activated when powered, which could
cause deployment of the air bag(s) an ...
Installation Procedure
Create 5 x 18 mm (4/16 x 11/16 in) slots for MIG-Brazing along the edges
of the front wheelhouse panel rear reinforcement as
noted from the original panel.
Create a 5 x 18 mm (4/16 x 11/16 in) slot for MIG-Brazing where front
wheelhouse front panel and front wheelhouse panel ...
Rear Compartment Lid Emblem/Nameplate Replacement (Chevrolet)
Rear Compartment Lid Emblem Assembly
Caution: Refer to Exterior Trim Emblem Removal Caution in the Preface
section.
Procedure
The part and surface should be 21°C (70°F) prior to installation. The
vehicle should remain 21°C (70°F) for
one hour after assembly to allow adhesive to deve ...